package com.hmdp.utils;

import cn.hutool.core.lang.UUID;
import org.springframework.data.redis.core.StringRedisTemplate;

import java.util.concurrent.TimeUnit;


public class SimpleRedisLock implements ILock{
    private StringRedisTemplate stringRedisTemplate;
    private String name;
    private static final String KEY_PREFIX = "lock:";
    private static final String ID_PREFIX = UUID.randomUUID().toString(true)+"-";
    public SimpleRedisLock(StringRedisTemplate stringRedisTemplate, String name) {
        this.stringRedisTemplate = stringRedisTemplate;
        this.name = name;
    }
    @Override
    public boolean tryLock(long timeoutSec) {
        // 获取线程标识
        String threadId = ID_PREFIX+Thread.currentThread().getId();
        //获取锁
        Boolean success = stringRedisTemplate
                .opsForValue()
                .setIfAbsent(KEY_PREFIX + name, threadId, timeoutSec, TimeUnit.SECONDS);
        return Boolean.TRUE.equals(success);
    }

    @Override
    public void unlock() {
        // 获取线程标识
        String threadId = ID_PREFIX + Thread.currentThread().getId();
        // 获取锁中的线程标识
        String id = stringRedisTemplate.opsForValue().get(KEY_PREFIX + name);
        // 判断是否同一个线程
        if (threadId.equals(id)) {
            // 删除锁
            stringRedisTemplate.delete(KEY_PREFIX + name);
        }

    }

    @Override
    public String getName() {
        return "";
    }
}
